a2 seemed the most promising, but A3 could also have potential, so I would carry these two options on to the next level.
Title with ornament of a basket of flowers, a2 (verso blank).
It is at once evident that a2, for example, corresponds to the point, a1.
Let A1, a2, A3 etc. be moments of α in the order of their occurrences.
Now let us examine the only known example of a sign for the eighth term (a2, fig. 60).
The combination of these two elements in one head, as we have seen, indicates the numeral 15, and a2 therefore records 15 katuns.
The smallest ring, a2, contains the bearings for the axis of a heavy ball B.
If the arch be very large, a fourth order of magnitude is added, as at a2.
At the surface of the ground there is no inequality of level—the beds overlying the coal (a2) having been removed by denudation.
The chests, a a2 a3 a4, may be of any desired shape and dimensions and any desired number may be used.